This is a summary of the 1904 & 1905 services provided by Dr. Mae H. Cardwell for the family of Louie Ling Heung, father of Louie Chouey. 

Dr. Mae Cardwell delivered many Chinese babies and cared for their families in Portland, Oregon. She frequently was called on as a witness to verify the identity of her Chinese patients and confirm the details of births, illnesses, and deaths. She kept impeccable records and had a good memory for details.
On 6 May 1911 Inspector John B. Sawyer interviewed Dr. Cardwell about Louie Chouey, son of Louie Ling Heung.  Cardwell told the inspector that she had known Louie Chouey since he was a little child. She attended his mother when she was sick and delivered two of her younger children, a son and a daughter.  The little girl, Long Hoo, died in 1904.The mother died from tuberculosis in 1905.
During the May 1911 interview the inspector asked Dr. Cardwell four times if this Louie Chouey was the same person she knew six years ago. She answered a firm yes the first three times she was asked but the fourth time she said that she was “pretty sure.”
On 6 June 1911 Dr. Cardwell was sworn in again and gave the inspector a summary of her records pertaining to the Louie Ling Heung family from 1904 and 1905. She said since her first testimony her suspicions had been aroused about the identity of Louie Chouey. She was no longer certain that the applicant was who he claimed to be.  
[It is hard to know if the inspector’s repeated questioning planted a seed of doubt in Cardwell’s mind or if she had her own doubts.]
The inspector advised the applicant that he was not prepared to approve his application and that he had a right to appeal. There is no more information in the file. Louie Chouey did not file an appeal. [Was it because he wasn’t the person he claimed to be or did he just not have the ability to prove that he was Louie Chouey?]

[Dr. Mae Cardwell appears as a witness in many of the Portland case files. Her name generally does not appear in the index for the case files because the files are indexed by the subject of the file, not for incidental people. Since Dr. Cardwell was a witness many times her name caught the interest of the indexers. Most of those case files have a happier outcome.]
For a biography of Dr. Mae Harrington Cardwell’s impressive career go to National Library of Medicine.
None of her biographies mention her work with the Chinese community.